Kulboka signed a five-year deal with German powerhouse Brose Bamberg in August 2015.[1] In his first year, he exclusively saw action on their affiliated teams in the German under-19 youth Bundesliga NBBL (TSV Breitengüßbach), and in the second German division 2. Bundesliga ProA (Baunach Young Pikes). He helped Breitengüßbach capture the 2016 NBBL title,[2] while averaging 6.4 points, as well as 1.5 rebounds a contest for Baunach in ProA play.[3] In 2016, he attended the Basketball Without Borders Global Camp in Toronto, Canada,[4] as well as the Adidas Eurocamp in Treviso.[5]
In the 2016–17 season, he improved his stats to 14.7 points, 4.3 rebounds and 2 assists per game for Baunach in ProA action. On 1 May 2017, Kulboka made his debut for Brose Bamberg in Germany's top-tier level Basketball Bundesliga, in a 61–74 win over Science City Jena, in which he recorded 13 points and 5 rebounds.[6]
In June 2017, Kulboka participated in adidas Eurocamp. He was named best sniper of the camp, by scoring 10 three-pointers in a row.[7] Furthermore, he was also named to the First Team All-Eurocamp 2017.[8][9] During the same year, he declared for the 2017 NBA draft, but withdrew on 12 June.[10][11]
On 23 July 2018, Brose Bamberg announced that Kulboka would return to the team.[15]
Bilbao (2019–2021)
On 6 August 2019, Kulboka signed with Spanish club RETAbet Bilbao Basket.[16] He averaged 8.5 points and 3.6 rebounds per game in his first season with the team. On June 12, 2020, Kulboka extended his contract for two seasons.[17] In the summer of 2021, he left Bilbao after receiving an offer from the Charlotte Hornets.[18]
Charlotte Hornets (2021–2022)
Near the end of the 2017–18 season, Kulboka would enter his name in the 2018 NBA draft, being one of only 11 international players to declare for the draft early that year.[19] On 21 June 2018, he was drafted by the Charlotte Hornets, in the second round (55th overall).[20][21] He represented Hornets during the 2018 NBA Summer League.[22][23] During his debut game he scored 12 points per 13 minutes and helped his team to achieve an 88–87 victory over the Oklahoma City Thunder.[24] Kulboka represented Hornets during the 2019 NBA Summer League once again.[25] He played his best game versus the China men's national basketball team, scoring 18 points and grabbing 4 rebounds.[26]
On 3 August 2021, the Charlotte Hornets signed Kulboka to a two-way contract for the 2021–22 season. Under the terms of the deal, he will split time between the Hornets and their NBA G League affiliate, the Greensboro Swarm.[27]
On 11 December 2021, Kulboka debuted as a Charlotte Hornets member during an NBA game and played 3 minutes.[28]He checked in one more time on 10 April 2024 for 3 minutes.[29]
Promitheas Patras (2022–2023)
On 5 July 2022, Kulboka signed a one-year contract with Greek club Promitheas Patras.[30] On 25 January 2023, Kulboka recorded a career-high 30 points (10/13 FG), four rebounds, three assists and a 36-point PIR in a 81–72 home win over Budućnost VOLI.
In 27 domestic league matches, Kulboka averaged 12.1 points (shooting with 44% from the 3-point line) and 5.3 rebounds, playing around 28 minutes per contest. Additionally, in 20 EuroCup games, he averaged 14.7 points and 5.9 rebounds, playing around 31 minutes per contest.